摘要
芸苔素内酯·吲哚乙酸·赤霉酸(BHG)对多种农作物增产提质效果显著,但BHG增产提质效果与所处氮水平的关系及相应作用机理尚不清晰。为探讨小白菜产量、品质和有机酸与不同外源氮水平条件下BHG的响应关系及作用机理,采用人工气候室水培法,以小白菜(Brassica chinensis L.,速生绿秀)为试验材料,设1、3、10 mmol·L-13个氮浓度,比较5μg·L-1 BHG和清水处理对小白菜生长指标、产量、品质及有机酸、氮磷钾养分、激素含量的影响。3 mmol·L-1氮水平下,添加BHG显著提高小白菜产量14.87%、可溶性蛋白0.05个百分点、根质量22.95%、根有机酸含量23.89%、钾含量2.64个百分点,ZT/ABA(玉米素/脱落酸)、IAA/ABA(吲哚乙酸/脱落酸)值分别升高97.66%、58.88%。1 mmol·L-1氮水平下,添加BHG使小白菜可溶性蛋白降低0.04个百分点,糖酸比升高637.86%,ZT/ABA值降低15.19%,IAA/ABA值降低58.36%,根长、根鲜质量降低12.50%、15.16%,但对小白菜产量无显著影响。10 mmol·L-1氮水平下,BHG显著提高小白菜可溶性糖0.09个百分点、有机酸含量12.97%、根长20.84%、根部有机酸36.18%、营养液有机酸16.21%、吲哚乙酸含量17.74%、玉米素含量11.62%、水杨酸含量23.57%,使ZT/ABA、IAA/ABA值分别升高38.50%和46.08%,可溶性蛋白显著降低0.07个百分点,但对小白菜产量无显著影响。研究表明,BHG对小白菜产量、品质的影响与其所处氮水平密切相关,BHG在3 mmol·L-1氮水平显著增产提质,主要机理为调控小白菜内源激素含量,提高ZT/ABA、IAA/ABA值及根质量和有机酸含量,进而提高小白菜营养元素的积累和利用.
Brassinolactone·indoleacetic acid·gibberellic acid(BHG)has a significant effect on improving the yield and quality of a variety of crops.However,the relationship between the nitrogen level and the increased yield and enhanced quality due to BHG,as well as the mechanism underlying these effects,are still unclear.This study aimed to investigate the effects of BHG on the yield and quality of pakchoi(Brassica chinensis L.)under different nitrogen levels.Then,the mechanism by which BHG influenced the yield and quality of pakchoi and the relationship between the yield increase and quality change due to BHG and the nitrogen level was discussed to provide a basis for reducing the weight and increasing the efficiency of nitrogen fertilizer in order to achieve high-efficiency and high-yield production of pakchoi.The study was carried out with Brassica chinensis L.(Su sheng lv xiu)as test materials,adopting an artificial climate chamber hydroponic method.Under conditions of 1,3 mmol·L^(-1),and 10 mmol·L^(-1)nitrogen concentrations,5μg·L^(-1)of BHG and deionized water(control)were added respectively for six treatments,with six repetitions.The growth index,yield,NPK content,organic acid,endogenous kinin content,water-soluble protein,and water-soluble sugar of pakchoi were compared.The results showed at the nitrogen level of 3 mmol·L^(-1),adding BHG significantly increased the yield of pakchoi by 14.87%,soluble protein by 0.05 percentage point,root weight by 22.95%,root organic acid content by 23.89%,potassium content by 2.64 percentage point,and ZT/ABA(zeatin/abscisic acid)and IAA/ABA(indoleacetic acid/abscisic acid)values by 97.66%and 58.88%,respectively.At the nitrogen level of 1 mmol·L^(-1),adding BHG reduced the soluble protein of pakchoi by 0.04 percentage point,increased the sugar-acid ratio by 637.86%,decreased the ZT/ABA value by 15.19%,and the IAA/ABA ratio by 58.36%.However,there was no significant effect on the yield of pakchoi.The root length and fresh weight of pakchoi decreased by 12.50%and 15.16%.At the
作者
王庆彬
彭春娥
孟慧
王洪凤
王晓琪
贾春花
李泽丽
李洋
耿全政
刘之广
张民
WANG Qing-bin;PENG Chun-e;MENG Hui;WANG Hong-feng;WANG Xiao-qi;JIA Chun-hua;LI Ze-li;LI Yang;GENG Quan zheng;LIU Zhi-guang;ZHANG Min(National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources,College of Resources and Environment,Shandong Agricultural University,Tai′an 271018,China;Shandong Pengbo Biotechnology Co.,Ltd.,Tai′an 271018,China;State Key Laboratory of Crop Biology,College of Life Sciences,Shandong Agricultural University,Tai′an 271018,China)
出处
《农业资源与环境学报》
CAS
CSCD
北大核心
2021年第4期626-635,共10页
Journal of Agricultural Resources and Environment
基金
国家重点研发计划项目(2017YFD0200706)
山东省重点研发计划项目(2019GNC106011)
山东省重点研发计划重大科技创新工程项目(2019JZZY020608)。
关键词
芸苔素内酯·吲哚乙酸·赤霉酸(BHG)
营养液氮浓度
小白菜
产量
品质
植物内源激素
brassinolactone·indoleacetic acid·gibberellic acid(BHG)
nitrogen concentration of nutrient liquid
pakchoi
yield
quality
plant endogenous hormones
